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1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dca4d1939416f82b0fe72e09501c552da88a0d34ee886271cec71440ac8ef2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cbf4653-cf85-40ce-923e-ee023c4a964a.json and https://artists.proofprofile.net/proofs/artist/2cbf4653-cf85-40ce-923e-ee023c4a964a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341178bc646d7330bb6ac7f4ea198797d7b247348be012b48e062dec90608be3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRS182079884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7701a57e3d32adc5650ca13c9f81ec522e85193759ce06bf6052d64858cddb13. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2273056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51aad67bf1626bdf28c9308fa131218d6b0827778c2a6901e6df12c5fc8f6a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2273067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296c72847e7b5c3e7a99acef4f92e63779c516a97617c42fb7fd8f78f5bcafcf. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2273075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c51d5fbbbbccf3a636fdbf9810d8f2c62e8df6e4738abaaa8c0d1bff7db0659. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2273081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9fdaad15b779b3757ae3b69e814e616d992c56fd5a3ab892392d4858559c6d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2273094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc89cd872899cb0f4274997413f6695574017b3cdaf0e388f5bdc555bb2a190. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2243265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e420b670a28655bc4ac287fcb72e7bd8fc4c5328758fbaef22a8442558be175. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032409512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c9ebf336b9e1f9de7cfd14bae8f480158d23aebafe201ea69d216df85da9a6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032414465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7346a577f991e12b9aa8adb700ab3363203f7d427335bdaa2884cd2617e34152. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032418811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89771e26bcddd06e7262354053b895238306e6b693eb86f437e68a8c6517e61c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032418989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea44edf7def4b1037a52a9d72d00bc8dee558af9c475d2db5cf45808d1a1f4b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032420153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7c9f3261e20ed3f6c7f508164aaf4e27e434695df648165b5f1acd3036aca0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CHF032512357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6f05945a4f1202e46e83fe31312cd635d12fec0667511ec5303a11cbb715d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INS172102534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a9f1b53cdf419425e716c9e71785acb0c27f26698d7f9e4c053fa4bd0a904. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB72246622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c9533a3f228d2f5b84a731ebf81259f0df279a500b2133c0aaa01b146513bb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92418787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791eb9cc41325be895a99497f30cf59639ab0c2aa14f4bb4d66cf58fadb4b248. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X2398182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791eb9cc41325be895a99497f30cf59639ab0c2aa14f4bb4d66cf58fadb4b248. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X2398182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d8441d8997c52e8fbe3d8c0677a32e498716af2652c342af1e6b022e891edd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA052272449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1469926ef4b9839f5b7f8dba46ab2da71c9cba402deb34b413c9e9772a7bea3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA52006740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cf89df93cedb37be62b6fd5c7b04c426afc1fe997169552944907ce6822646. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INUM72300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c84b0eaae11dfb5b335519d7a16343a07c2a5a07169fb2109053682c3000755. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INUM72200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c91d6ee5a52660244fe0f40f2d73bb806aed460c567ca1ddb9b9321136ccd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INUM72200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc3e7bb4cdfe3963d4341c419d9da314a93c56829cddcda997574c153ca93d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INUM72200219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7353c92b09f45a3aad81453df3aed36b569343f65aa56075833ef0e4520309a5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INUM72200220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060c91d6ee5a52660244fe0f40f2d73bb806aed460c567ca1ddb9b9321136ccd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/INUM72200170.